Revit二开---Schemachema扩展数据
一.什么是Schema
Schema是Revit扩展数据的技术关键词,revit到这里,需要对Revit二开基础有一定了解。
二.Schema架构
建立revit扩展数据第一步是建立Schema(类似建立架构设计,设计Schema存储结构,类似设计DB 数据表结构),第二步是将扩展数据放入Entity,最终保存的位置在Element。
三.代码
SchemaMaager
public class SchemaManager { private static SchemaManager instance; public static SchemaManager Current { get { if(instance == null) instance = new SchemaManager(); return instance; } } protected SchemaManager() { } public Schema CreateSchema(Guid id,string name,string documentation,AccessLevel readAccessLevel,AccessLevel writeAccessLevel, string[] fieldNames,string vendorID = "ADSK") { if (GetSchema(id) != null) return GetSchema(id); SchemaBuilder schemaBuilder = new SchemaBuilder(id); schemaBuilder.SetSchemaName(name); schemaBuilder.SetDocumentation(documentation); schemaBuilder.SetReadAccessLevel(readAccessLevel); schemaBuilder.SetWriteAccessLevel(writeAccessLevel); schemaBuilder.SetVendorId(vendorID); foreach(var fieldName in fieldNames) { schemaBuilder.AddSimpleField(fieldName, typeof(string)); } return schemaBuilder.Finish(); } public Schema GetSchema(Guid id) { return Schema.Lookup(id); } public void SetEntity<T>(Element element,Guid schemaId,string fieldName,T data) { Entity ent = element.GetEntity(GetSchema(schemaId)); if (ent.Schema == null) ent = new Entity(schemaId); ent.Set(fieldName, JsonConvert.SerializeObject(data)); element.SetEntity(ent); } public void SetEntity(Element element, Guid schemaId, string fieldName, string data) { Entity ent = element.GetEntity(GetSchema(schemaId)); if (ent.Schema == null) ent = new Entity(schemaId); ent.Set(fieldName, data); element.SetEntity(ent); } }
SchemaCreater
public class SchemaCreater { public static void CreateSchemaOfID() { SchemaManager.Current.CreateSchema(SchemaIds.IDData, "Schema_ID", "Schema id data", Autodesk.Revit.DB.ExtensibleStorage.AccessLevel.Public, Autodesk.Revit.DB.ExtensibleStorage.AccessLevel.Vendor, new string[] {SchemaFields.JackExt }); } }
测试代码:
//扩展数据测试 [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)] [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)] public class SchemaDataTest : IExternalCommand { public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { Document doc = commandData.Application.ActiveUIDocument.Document; SchemaData.SchemaCreater.CreateSchemaOfID(); //创建Schema Wall wall = WallHelper.CreateWall(commandData); UIDocument uiDocument = commandData.Application.ActiveUIDocument; if (wall != null) { using (Transaction trans = new Transaction(doc)) { trans.Start("jack"); SchemaData.SchemaManager.Current.SetEntity(wall, SchemaIds.IDData, SchemaFields.JackExt, "jack_e920572f-ba66-4af8-99d6-498d97fe0bfe"); trans.Commit(); } return Result.Succeeded; } else return Result.Failed; } }
代码架构:
源代码下载:
https://files.cnblogs.com/files/xiaowangzi1987/RevitTestPro.rar
三.注意
1.创建Schema不需要开启事务
2.当writeAccessLevel或readAccessLevel为Vendor的时候,vendorId必须与Addin文件中的VendorId保持一致, 否则会没有写(读)扩展数据的权限,并抛出异常;
3.一个Entity可以有多个Schema,一个Schema可以有多个 Field 。
如果有一个实体类需要存为扩展数据,方法一:建立一个Field,将实体类JSON序列化,存储字符串。 方法二:建立多个Field,一个Field对应实体类的属性字段。 方法三:建立多个Schema,一个Schema建一个Field,一个Field对应实体类的属性字段。